Symfony 表单：上传的图像未显示在编辑表单中

Question

我正在尝试为 Cafe 实体创建表单。

咖啡厅.php

 class Cafe{

    /**
     * @var string $image
     * @Assert\File( maxSize = "1024k", mimeTypesMessage = "Please upload a valid Image")
     * @ORM\Column(name="image", type="string", length=255, nullable=true)
     */
     private $image;
 }

CafeType.php

/**
 * @param FormBuilderInterface $builder
 * @param array $options
 */
public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('name', TextType::class, array('label' => 'Name'))
        ->add('image', FileType::class, array(
            'label' => 'Image',
            'data_class' => null,
            'required'    => false
        ))
    ;
}

CafeController.php

public function editAction(Request $request, Cafe $cafe)
{
    $editForm = $this->createForm('AdminBundle\Form\CafeType', $cafe);
    $editForm->handleRequest($request);

    if ($editForm->isSubmitted() && $editForm->isValid()) {
        $img = $editForm['image']->getData();
        if($img){
            $fileLocation = $this->get('app.s3_file_uploader')->putFileToBucket($img, 'cafe-images/'.uniqid().'/cafe-image');
            $cafe->setImage($fileLocation);
        }

        $em = $this->getDoctrine()->getManager();
        $em->persist($cafe);
        $em->flush();

        return $this->redirectToRoute('cafe_index');
    }

    return $this->render('AdminBundle:Cafe:edit.html.twig', array(
        'cafe' => $cafe,
        'edit_form' => $editForm->createView()
    ));
}

在控制器中，我使用自定义服务将图像保存在 S3 存储桶中，该存储桶返回图像位置文件位置。然后我将此文件 url 设置为 Cafe 实体的 $image 属性。

创建咖啡馆工作正常。但是当我尝试编辑咖啡馆时，上传输入为空。这样当我点击保存时，旧图像就会被删除。每次我想编辑咖啡馆时，我都需要上传 iamge。如何将图像文件保持为编辑形式？

Answer 1

为此创建 2 个字段：

• 图像 - 用于数据库
• image2 - 用于表格

咖啡厅.php

 class Cafe{

    /**
     * @var string $image
     * @ORM\Column(name="image", type="string", length=255, nullable=true)
     */
     private $image;

    /**
     * @var string $image
     * @Assert\File( maxSize = "1024k", mimeTypesMessage = "Please upload a valid Image")
     */
     private $image2;

 }

CafeType.php

/**
 * @param FormBuilderInterface $builder
 * @param array $options
 */
public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('name', TextType::class, array('label' => 'Name'))
        ->add('image', TextType::class, array(
            'label' => 'Image',
            'readonly' => true,
            'required'    => false
        ))
        ->add('image2', FileType::class, array(
            'label' => 'Image',
            'data_class' => null,
            'required'    => false
        ))
    ;
}

CafeController.php

public function editAction(Request $request, Cafe $cafe)
{
    $editForm = $this->createForm('AdminBundle\Form\CafeType', $cafe);
    $editForm->handleRequest($request);

    if ($editForm->isSubmitted() && $editForm->isValid()) {
        $img = $editForm['image2']->getData();
        if($img){
            $fileLocation = $this->get('app.s3_file_uploader')->putFileToBucket($img, 'cafe-images/'.uniqid().'/cafe-image');
            $cafe->setImage($fileLocation);
        }

        $em = $this->getDoctrine()->getManager();
        $em->persist($cafe);
        $em->flush();

        return $this->redirectToRoute('cafe_index');
    }

    return $this->render('AdminBundle:Cafe:edit.html.twig', array(
        'cafe' => $cafe,
        'edit_form' => $editForm->createView()
    ));
}

希望这会有所帮助

Answer 2

呜呜呜~

我建议你看看我这里的回复，第 4 点，editAction 部分： https://stackoverflow.com/a/38945180/6711360

诚挚的，
精准